var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var studentRouter = require("./routes/studentRouter");
var testRouter = require("./routes/test_table");

var bodyParser = require("body-parser");

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

// 处理post请求
app.use(bodyParser.urlencoded({extended:true}));
app.use(bodyParser.json());

var connection = require("./db/connection.js");
connection.connect(); //启动数据库连接！！！！

// 解决跨域 1. cors
var cors = require('cors'); 
app.use(cors()); 
//设置允许跨域访问该服务 2.
// app.all('*', function (req, res, next) {
//   console.log('请求')
//   res.header('Access-Control-Allow-Origin', '*');
//   res.header('Access-Control-Allow-Headers', 'Content-Type');
//   res.header('Access-Control-Allow-Methods', '*');
//   res.header('Content-Type', 'application/json;charset=utf-8');
//   next();
// });


app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/student', studentRouter);
app.use('/test',testRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
